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P3 International P4400 Kill A Watt Electricity Usage Monitor | 
 enlarge | Brand: P3 International
Category: CE
List Price: $34.63
Buy New: $14.75
You Save: $19.88 (57%)
New (72)
Rating:  295 reviews
Color: Ivory
Media: Electronics
Autographed: No
Memorabilia: No
Shipping Weight (lbs): 2
Dimensions (in): 11.8 x 3 x 7.3
Weight: 5 oz.
Dimensions: 5 1/8" X 1 5/8" X 2 3/8"
Warranty: 2 years
ETL Approved
Legal Disclaimer: Warranty does not cover misuse of product.
MPN: P4400
Model: P4400
UPC: 840356945811
EAN: 0751549044009
ASIN: B00009MDBU
Availability: Usually ships in 1-2 business days
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| Features:
| | Electricity usage monitor connects to appliances and assesses efficiency | | | Large LCD display counts consumption by the kilowatt-hour | | | Calculates electricity expenses by the day, week, month, or year | | | Displays volts, amps, and wattage within 0.2 percent accuracy | | | Compatible with inverters; designed for use with AC 115-volt appliances |
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| Editorial Reviews:
Product Description
Connect your appliances into the Kill A Watt, and assess how efficient they are. A large LCD display counts consumption by the Kilowatt-hour just like utility companies. You can figure out your electrical expenses by the hour, day, week, month, even an entire year. Monitor the quality of your power by displaying Voltage, Line Frequency, and Power Factor
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| Customer Reviews: Read 290 more reviews...
 Fascinating gadget July 9, 2005
Phillip Roncoroni (Manhattan, New York)
451 out of 457 found this review helpful
I absolutely love this thing.
Having recently moved out on my own, and generally just enjoying statistics in general, I bought this to monitor my electric costs after two high electric bills in a row. The various results I found were quite surprising.
My air purifier, which I bought here on Amazon, uses 85 watts all the time... 85 * 24 hrs * 30 days / 1000 watts = 61.2kWhr * $0.20 = $12.24 a month.
Well, that's quite a costly monthly addition I never thought of. And that's just the begining.
My Vornado fan uses 45w... my air conditioner, on high 6 (out of 12) spikes up to 1200 watts. Jeez.
My computer, at idle with external drives, uses about 250w. When doing extremely intensive things, like encoding a video, 310w.
My light behind my computer desk, with five, 10-watt bulbs, doesn't actually use 50-watts total. No, it uses 50-watts for the bulbs, PLUS 30-watts apparently just for the light unit to function.
You too will find out all these things you never knew, and possibly save money by cutting out, or replacing energy guzzlers.
The product is also made in China. Just like everything else now.
Excellent Product! August 20, 2004
R. Nizlek (Burlington, VT, USA)
214 out of 218 found this review helpful
I absolutely love this product, it's one of the best devices I've aquired in a long time. When I purchased it a few years ago, I paid close to $50, but it was worth every penny. Some of my joy from using the device simply comes from the fact that I'm curious how much energy the products in my home use (I now know, for instance, that my cable box uses 15W of energy whether it is on or off, at that it wastes a little more than 10 kilowatt hours each month, or that my fridge uses 350W when on, or that my laptop only uses 40W - a useful fact to know when I went to buy an inverter to use it in my car), but it can also be used to save energy (I found that hitting the switch on the surge supressors of my computers at night can save me almost $5 a month off my electric bill). Additionally, it's interesting to find out where all the power you use goes, and even what members of the family use the most electricity (you could do a side by side comparason of a child's computer with yours).
Even though I've had my Kill-A-Watt for years, I still take it out regularly to test any new equipment in my home. I know my cell phone charger uses 4 W, my regular battery charger 5 W, and my IC3 15 minute battery charger 73 W.
Surely most will not have as much fun with this unit as I do, but it can be both practical and enjoyable for people such as myself or those looking to save some money off their electric bill. It's also an asset for anyone off-grid, who is generating their power with solar energy or by other renewable means.
Works Well September 16, 2005
Jack A. Mracek (Yucaipa, CA)
65 out of 65 found this review helpful
This is a nice little meter. It measures Volts, Amps, PowerFactor, Watts, VA, KWH and Elapsed Time in use. I got it to survey my house loads for a potential solar system and it performed very well. I could plug a device in to it for a week and figure out what the average power consumption was. I couldn't believe how bad the power factor is on my window swamp cooler.
The addition of a pigtail would be nice because it is hard to see behind furniture and it is so big that it uses an entire outlet while in use. A 240V mode would be nice also.
It worked better then I had expected.
Great Fun for Obessive Compulsive People February 12, 2006
Lance K. Wig (Asheville, NC)
66 out of 68 found this review helpful
If you are a "Miser," this device will be your best friend. I bought the "Kill-A-Watt" because I suspected that our old Fridge was shooting up the electric bill. I plugged the Fridge into the meter and left it for 3 days. I was very surprised to find out the the fridge was only burning about 1.5 KWH (Kilowatt Hours) per day, which is about what it should.
Now I am going around the house and plugging other appliances in for a couple days. The real shocker was that my "economical" eMachines PC along with a CRT monitor was using more energy than the fridge! The computer was burning almost 2 KWH per day. I made changes to the energy saver software in Windows, so that the monitor automatically shuts off in 10 minutes and the computer hibernates in 1 hour. This has brought the daily consumption down to 1 KWH.
For those of you who don't understand KWH, its a measurement of electric usage by the power company. To be simple, using a KWH is about .08 in our area. So, if you save 1 KWH per day, you save .08 After a month's time, it's about $2.48. After a year it's about $30 bucks. The savings add up over time.
With the Kill-A-Watt, I've found out lots of interesting things:
My Mac Mini with a LCD monitor uses about 1/2 the power of my eMachines Tower with CRT. That's 70 Watts vs. 140 Watts.
My Electric Blanket which I though was "economical" pulls 120 Watts during operation. It actually uses 1 KWH per day. I even found out that the blanket burns 10 Watts when the power switch is off!
I found many "power bandits" in my home. These are devices like cellphones, scanners, routers, modems that have those little black power blocks. Most of these devices use 5 to 10 watts with the power switch off. With the Kill-A-Watt, I was able to find the biggest offenders and plug them into a timer that shuts off each night when they are not in use.
If you are truly obsessive about your electrical bill like me, you can make a nice Excel spreadsheet with all your appliances. You can enter Watts, Kilowatt Hours, Price per hour and than figure if replacing a device would pay for the purchase and how long it will take.
As everyone says in their reviews, "This device will pay for it's self."
Great Gadget, Excellent for for Monitoring Energy Usage January 16, 2006
Patrick S. Pope (Chicago, IL)
32 out of 35 found this review helpful
There were two primary reasons that I purchased the Kill-A-Watt: 1) to measure the [questionable] energy savings performance of the Power Planner by Energy Smart (see review) 2) to disprove the stated 2900 Watts on my Bellissima Ionic Volcano Hair Dryer (see review). Tertiary reasons included a general interest in energy savings. As it turns out, the Kill-A-Watt demonstrated that both aforementioned devices did not live up to stated manufacturer claims.
The Kill-A-Watt plugs into any typical grounded three-prong receptacle. It also has a receptacle so it acts as a splice, presumably measuring voltage and current to determine power in watts (ohm's law V=IR, Power=VI). In addition to measuring power, voltage and current in real-time, it can also measure kilowatt hours (kwh), via an imbedded timer. This unit, kwh, is the measure by which your electric utility company bills you.
In general, the Kill-A-Watt is extremely easy to use. There is a large LCD display indicating the value of interest. The digital readout and buttons make it extremely easy to navigate through the various functions.
Particularly interesting is observing the difference between the stated wattages and realized wattages of various consumer devices. It is also interesting to watch the energy creep caused by thermal factors (in p=ir^2). FYI, for typical resistive elements "R" goes up as temperature increases.
As you can see, the Kill-A-Watt allowed me to disprove various manufacturer claims.
Measured Wattages:
Belissma 2900 Watt Hair Dryer
Ionic Hair Dryer (aka Volcano) ...1525 Watts
ConAir 1875.............................1515
Hair Made 1875........................1540
Andis ProStyle .........................1250
Other Consumer Devices:
Heated Towel Warmer (stated 100 watts)....... 131
Lights:
Sunbox Sunray Full Spectrum Lightbox (stated 120 watts)....123 watts
Lights of America Fluorex Outdoor Lamp (stated 65 watts).....65 watts
Lightwitz 30 watt light bulb..... 30 watts
Lights of America 200 Watt Equivalent Compact Fluorescent (stated 42 watts)....45 Watts
It is important to note that the Power Planner by EnergySmart was intended to save money on devices with older electric motors. In my review of the Power Planner, I outlined the test results using the device on my parents 40+ year old secondary refrigerator. Sadly, the Kill-A-Watt showed that there was no realized difference using the Power Planner over multiple 24 hour periods.
If you have any interest in energy conservation/savings or are questioning manufacturer claims, I would highly recommend that you purchase the Kill-A-Watt. It is great for measuring instantaneous power, current and voltage, but also power consumption over a period of time.
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